NLGrassGrazed1Spring.cpp

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/*
*******************************************************************************************************
Copyright (c) 2017, Christopher John Topping, Aarhus University
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*/
//
// NLGrassGrazed1Spring.cpp
//
 
 
#include "../../Landscape/ls.h"
#include "../../Landscape/cropprogs/NLGrassGrazed1Spring.h"
 
bool NLGrassGrazed1Spring::Do(Farm *a_farm, LE *a_field, FarmEvent *a_ev)
{
    bool done = false; // The boolean value done indicates when we are totally finished with this plan (i.e. it is set to true).
    int d1 = 0;
    // Depending what event has occured jump to the correct bit of code
    switch (a_ev->m_todo)
    {
    case nl_gg1s_start:
    {
        // nl_gg1s_start just sets up all the starting conditions and reference dates that are needed to start a nl_pot
        NL_GG1S_CUT_DATE = 0;
        NL_GG1S_WATER_DATE = 0;
 
 
        // Set up the date management stuff
        // The next bit of code just allows for altering dates after harvest if it is necessary
        // to allow for a crop which starts its management early.
 
        // 1 start and stop dates for all 'movable' events for this crop
        int noDates = 1;
        a_field->SetMDates(0, 0, g_date->DayInYear(10, 10)); //  last possible day of last cutting
        a_field->SetMDates(1, 0, g_date->DayInYear(30, 10)); // last possible day of NPK application
 
        a_field->SetMConstants(0, 1);
 
        // Check the next crop for early start, unless it is a spring crop
        // in which case we ASSUME that no checking is necessary!!!!
        // So DO NOT implement a crop that runs over the year boundary (i.e. from spring to spring!), at least not without fixing this.
 
        //new if: do the check only for non-optimising farms and if year>0. (030713 - m_rotation used only in the hidden year, so I modified the condition from >7 to >0)
        //optimising farms not used for now so most of related code is removed (but not in 'start' case)
        if (!(a_farm->GetType() == tof_OptimisingFarm && g_date->GetYearNumber() > 0)) {
 
            if (a_ev->m_startday > g_date->DayInYear(1, 7)) {
                if (a_field->GetMDates(0, 0) >= a_ev->m_startday)
                {
                    g_msg->Warn(WARN_BUG, "NLGrassGrazed1Spring::Do(): ", "Harvest too late for the next crop to start!!!");
                    int almassnum = g_landscape_p->BackTranslateVegTypes(a_ev->m_next_tov);
                    g_msg->Warn("Next Crop ", (double)almassnum); // this causes exit
                }
                // Now fix any late finishing problems
                for (int i = 0; i < noDates; i++) {
                    if (a_field->GetMDates(0, i) >= a_ev->m_startday) {
                        a_field->SetMDates(0, i, a_ev->m_startday - 1); //move the starting date
                    }
                    if (a_field->GetMDates(1, i) >= a_ev->m_startday) {
                        a_field->SetMConstants(i, 0); //change the default value of the MConst (=1) to 0 (necessary to correctly execute farm events in case the finishing date (MDate) was moved)
                        a_field->SetMDates(1, i, a_ev->m_startday - 1); //move the finishing date
                    }
                }
            }
            // Now no operations can be timed after the start of the next crop.
 
            if (!a_ev->m_first_year) {
                d1 = g_date->OldDays() + m_first_date + 365; // Add 365 for spring crop
                if (g_date->Date() > d1) {
                    // Yes too late - should not happen - raise an error
                    g_msg->Warn(WARN_BUG, "NLGrassGrazed1Spring::Do(): ", "Crop start attempt after last possible start date");
                    int prev = g_landscape_p->BackTranslateVegTypes(a_field->GetOwner()->GetPreviousCrop(a_field->GetRotIndex()));
                    g_msg->Warn(WARN_BUG, "Previous Crop ", prev);
                    int almassnum = g_landscape_p->BackTranslateVegTypes(a_ev->m_next_tov);
                    g_msg->Warn("Next Crop ", (double)almassnum); // this causes exit
                    exit(1);
                }
            }
            else {
                // Is the first year
                // Some special code to cope with that first start-up year in ALMaSS - ignore for all practical purposes
                // Code for first spring treatment used
                SimpleEvent_(g_date->OldDays() + g_date->DayInYear(1, 3), nl_gg1s_spring_sow, false, a_farm, a_field);
                break;
            }
        }//if
 
         // End single block date checking code. Please see next line comment as well.
         // Reinit d1 to first possible starting date.
        d1 = g_date->OldDays() + g_date->DayInYear(28, 2);
        if (g_date->Date() >= d1) d1 += 365;
        // OK, let's go.
        // Here we queue up the first event
        SimpleEvent_(d1, nl_gg1s_preseeding_cultivator, false, a_farm, a_field);
    
    }
    break;
 
    // This is the first real farm operation
    case nl_gg1s_preseeding_cultivator:
        if (!a_farm->PreseedingCultivator(a_field, 0.0, g_date->DayInYear(20, 3) - g_date->DayInYear())) {
            SimpleEvent_(g_date->Date() + 1, nl_gg1s_preseeding_cultivator, true, a_farm, a_field);
            break;
        }
        SimpleEvent_(g_date->Date() + 1, nl_gg1s_spring_sow, false, a_farm, a_field);
        break;
    case nl_gg1s_spring_sow:
        if (!a_farm->SpringSow(a_field, 0.0, g_date->DayInYear(20, 3) - g_date->DayInYear())) {
            SimpleEvent_(g_date->Date() + 1, nl_gg1s_spring_sow, true, a_farm, a_field);
            break;
        }
        d1 = g_date->Date() + 7;
        if (d1 < g_date->OldDays() + g_date->DayInYear(1, 3)) {
            d1 = g_date->OldDays() + g_date->DayInYear(1, 3);
        }
        if (a_farm->IsStockFarmer()) //Stock Farmer
        {
            SimpleEvent_(d1, nl_gg1s_ferti_s2, false, a_farm, a_field);
        }
        else SimpleEvent_(d1, nl_gg1s_ferti_p2, false, a_farm, a_field);
        break;
    case nl_gg1s_ferti_p2:
        if (a_farm->DoIt_prob(0.90)) {
            if (!a_farm->FP_NPK(a_field, 0.0, g_date->DayInYear(30, 3) - g_date->DayInYear())) {
                SimpleEvent_(g_date->Date() + 1, nl_gg1s_ferti_p2, true, a_farm, a_field);
                break;
            }
        }
        if (a_farm->DoIt_prob(0.50)) {
            SimpleEvent_(g_date->OldDays() + g_date->DayInYear(25, 4), nl_gg1s_cut_to_silage1, false, a_farm, a_field);
        }
        else SimpleEvent_(g_date->OldDays() + g_date->DayInYear(5, 4), nl_gg1s_cattle_out, false, a_farm, a_field);
        break;
    case nl_gg1s_ferti_s2:
        if (a_farm->DoIt_prob(0.90)) {
            if (!a_farm->FA_NPK(a_field, 0.0, g_date->DayInYear(30, 3) - g_date->DayInYear())) {
                SimpleEvent_(g_date->Date() + 1, nl_gg1s_ferti_s2, true, a_farm, a_field);
                break;
            }
        }
        if (a_farm->DoIt_prob(0.50)) {
            SimpleEvent_(g_date->OldDays() + g_date->DayInYear(25, 4), nl_gg1s_cut_to_silage1, false, a_farm, a_field);
        }
        else SimpleEvent_(g_date->OldDays() + g_date->DayInYear(5, 4), nl_gg1s_cattle_out, false, a_farm, a_field);
        break;
    case nl_gg1s_cut_to_silage1:
        // At least 7 days from last watering and 21 from last application of fertilizer.
        if (g_date->Date() < NL_GG1S_WATER_DATE + 7) {
            SimpleEvent_(g_date->Date() + 1, nl_gg1s_cut_to_silage1, true, a_farm, a_field);
            break;
        }
        else
        {
            if (!a_farm->CutToSilage(a_field, 0.0, g_date->DayInYear(10, 5) - g_date->DayInYear())) {
                SimpleEvent_(g_date->Date() + 1, nl_gg1s_cut_to_silage1, true, a_farm, a_field);
                break;
            }
            NL_GG1S_CUT_DATE = g_date->DayInYear();
            if (a_farm->IsStockFarmer()) //Stock Farmer
            {
                SimpleEvent_(g_date->Date() + 1, nl_gg1s_ferti_s3, false, a_farm, a_field);
            }
            else SimpleEvent_(g_date->Date() + 1, nl_gg1s_ferti_p3, false, a_farm, a_field);
            // Start water thread
            SimpleEvent_(g_date->Date() + 1, nl_gg1s_watering, false, a_farm, a_field);
            break;
        }
        break;
 
    case nl_gg1s_ferti_s3:
        if (!a_farm->FA_Slurry(a_field, 0.0, (NL_GG1S_CUT_DATE + 4) - g_date->DayInYear())) {
            SimpleEvent_(g_date->Date() + 1, nl_gg1s_ferti_s3, true, a_farm, a_field);
            break;
        }
        SimpleEvent_(g_date->Date() + 1, nl_gg1s_ferti_s4, false, a_farm, a_field);
        break;
    case nl_gg1s_ferti_p3:
        if (!a_farm->FP_Slurry(a_field, 0.0, (NL_GG1S_CUT_DATE + 4) - g_date->DayInYear())) {
            SimpleEvent_(g_date->Date() + 1, nl_gg1s_ferti_p3, true, a_farm, a_field);
            break;
        }
        SimpleEvent_(g_date->Date() + 1, nl_gg1s_ferti_p4, false, a_farm, a_field);
        break;
    case nl_gg1s_ferti_s4:
        if (a_ev->m_lock || a_farm->DoIt_prob(0.90))
        {
            if (!a_farm->FA_NPK(a_field, 0.0, g_date->DayInYear(20, 5) - g_date->DayInYear())) {
                SimpleEvent_(g_date->Date() + 1, nl_gg1s_ferti_s4, true, a_farm, a_field);
                break;
            }
        }
        SimpleEvent_(g_date->Date() + 21, nl_gg1s_cut_to_silage2, false, a_farm, a_field);
        break;
    case nl_gg1s_ferti_p4:
        if (a_ev->m_lock || a_farm->DoIt_prob(0.90))
        {
            if (!a_farm->FP_NPK(a_field, 0.0, g_date->DayInYear(20, 5) - g_date->DayInYear())) {
                SimpleEvent_(g_date->Date() + 1, nl_gg1s_ferti_p4, true, a_farm, a_field);
                break;
            }
        }
        SimpleEvent_(g_date->Date() + 21, nl_gg1s_cut_to_silage2, false, a_farm, a_field);
        break;
    case nl_gg1s_cut_to_silage2:
        // At least 7 days from last watering and 21 from last application of fertilizer.
        if (g_date->Date() < NL_GG1S_WATER_DATE + 7) {
            SimpleEvent_(g_date->Date() + 1, nl_gg1s_cut_to_silage2, true, a_farm, a_field);
            break;
        }
        else
        {
            if (!a_farm->CutToSilage(a_field, 0.0, g_date->DayInYear(15, 6) - g_date->DayInYear())) {
                SimpleEvent_(g_date->Date() + 1, nl_gg1s_cut_to_silage2, true, a_farm, a_field);
                break;
            }
            NL_GG1S_CUT_DATE = g_date->DayInYear();
            if (a_farm->IsStockFarmer()) //Stock Farmer
            {
                SimpleEvent_(g_date->Date() + 1, nl_gg1s_ferti_s5, false, a_farm, a_field);
            }
            else SimpleEvent_(g_date->Date() + 1, nl_gg1s_ferti_p5, false, a_farm, a_field);
            break;
        }
        break;
    case nl_gg1s_ferti_s5:
        if (!a_farm->FA_Slurry(a_field, 0.0, (NL_GG1S_CUT_DATE + 4) - g_date->DayInYear())) {
            SimpleEvent_(g_date->Date() + 1, nl_gg1s_ferti_s5, true, a_farm, a_field);
            break;
        }
        SimpleEvent_(g_date->Date() + 1, nl_gg1s_ferti_s6, false, a_farm, a_field);
        break;
    case nl_gg1s_ferti_p5:
        if (!a_farm->FP_Slurry(a_field, 0.0, (NL_GG1S_CUT_DATE + 4) - g_date->DayInYear())) {
            SimpleEvent_(g_date->Date() + 1, nl_gg1s_ferti_p5, true, a_farm, a_field);
            break;
        }
        SimpleEvent_(g_date->Date() + 1, nl_gg1s_ferti_p6, false, a_farm, a_field);
        break;
    case nl_gg1s_ferti_s6:
        if (a_ev->m_lock || a_farm->DoIt_prob(0.90))
        {
            if (!a_farm->FA_NPK(a_field, 0.0, g_date->DayInYear(25, 6) - g_date->DayInYear())) {
                SimpleEvent_(g_date->Date() + 1, nl_gg1s_ferti_s6, true, a_farm, a_field);
                break;
            }
        }
        SimpleEvent_(g_date->Date() + 21, nl_gg1s_cut_to_silage3, false, a_farm, a_field);
        break;
    case nl_gg1s_ferti_p6:
        if (a_ev->m_lock || a_farm->DoIt_prob(0.90))
        {
            if (!a_farm->FP_NPK(a_field, 0.0, g_date->DayInYear(25, 6) - g_date->DayInYear())) {
                SimpleEvent_(g_date->Date() + 1, nl_gg1s_ferti_p6, true, a_farm, a_field);
                break;
            }
        }
        SimpleEvent_(g_date->Date() + 21, nl_gg1s_cut_to_silage3, false, a_farm, a_field);
        break;
    case nl_gg1s_cut_to_silage3:
        // At least 7 days from last watering and 21 from last application of fertilizer.
        if (g_date->Date() < NL_GG1S_WATER_DATE + 7) {
            SimpleEvent_(g_date->Date() + 1, nl_gg1s_cut_to_silage3, true, a_farm, a_field);
            break;
        }
        else
        {
            if (!a_farm->CutToSilage(a_field, 0.0, g_date->DayInYear(25, 7) - g_date->DayInYear())) {
                SimpleEvent_(g_date->Date() + 1, nl_gg1s_cut_to_silage3, true, a_farm, a_field);
                break;
            }
            NL_GG1S_CUT_DATE = g_date->DayInYear();
            if (a_farm->IsStockFarmer()) //Stock Farmer
            {
                SimpleEvent_(g_date->Date() + 1, nl_gg1s_ferti_s7, false, a_farm, a_field);
            }
            else SimpleEvent_(g_date->Date() + 1, nl_gg1s_ferti_p7, false, a_farm, a_field);
            break;
        }
        break;
 
    case nl_gg1s_ferti_s7:
        if (!a_farm->FA_Slurry(a_field, 0.0, (NL_GG1S_CUT_DATE + 4) - g_date->DayInYear())) {
            SimpleEvent_(g_date->Date() + 1, nl_gg1s_ferti_s7, true, a_farm, a_field);
            break;
        }
        SimpleEvent_(g_date->Date() + 1, nl_gg1s_ferti_s8, false, a_farm, a_field);
        break;
    case nl_gg1s_ferti_p7:
        if (!a_farm->FP_Slurry(a_field, 0.0, (NL_GG1S_CUT_DATE + 4) - g_date->DayInYear())) {
            SimpleEvent_(g_date->Date() + 1, nl_gg1s_ferti_p7, true, a_farm, a_field);
            break;
        }
        SimpleEvent_(g_date->Date() + 1, nl_gg1s_ferti_p8, false, a_farm, a_field);
        break;
    case nl_gg1s_ferti_s8:
        if (a_ev->m_lock || a_farm->DoIt_prob(0.90))
        {
            if (!a_farm->FA_NPK(a_field, 0.0, g_date->DayInYear(5, 8) - g_date->DayInYear())) {
                SimpleEvent_(g_date->Date() + 1, nl_gg1s_ferti_s8, true, a_farm, a_field);
                break;
            }
        }
        SimpleEvent_(g_date->Date() + 21, nl_gg1s_cut_to_silage4, false, a_farm, a_field);
        break;
    case nl_gg1s_ferti_p8:
        if (a_ev->m_lock || a_farm->DoIt_prob(0.90))
        {
            if (!a_farm->FP_NPK(a_field, 0.0, g_date->DayInYear(5, 8) - g_date->DayInYear())) {
                SimpleEvent_(g_date->Date() + 1, nl_gg1s_ferti_p8, true, a_farm, a_field);
                break;
            }
        }
        SimpleEvent_(g_date->Date() + 21, nl_gg1s_cut_to_silage4, false, a_farm, a_field);
        break;
    case nl_gg1s_cut_to_silage4:
        // At least 7 days from last watering and 21 from last application of fertilizer.
        if (g_date->Date() < NL_GG1S_WATER_DATE + 7) {
            SimpleEvent_(g_date->Date() + 1, nl_gg1s_cut_to_silage4, true, a_farm, a_field);
            break;
        }
        else
        {
            if (!a_farm->CutToSilage(a_field, 0.0, g_date->DayInYear(31, 8) - g_date->DayInYear())) {
                SimpleEvent_(g_date->Date() + 1, nl_gg1s_cut_to_silage4, true, a_farm, a_field);
                break;
            }
            NL_GG1S_CUT_DATE = g_date->DayInYear();
            if (a_farm->IsStockFarmer()) //Stock Farmer
            {
                SimpleEvent_(g_date->Date() + 1, nl_gg1s_ferti_s9, false, a_farm, a_field);
            }
            else SimpleEvent_(g_date->Date() + 1, nl_gg1s_ferti_p9, false, a_farm, a_field);
            break;
        }
        break;
    case nl_gg1s_ferti_s9:
        if (!a_farm->FA_Slurry(a_field, 0.0, (NL_GG1S_CUT_DATE + 4) - g_date->DayInYear())) {
            SimpleEvent_(g_date->Date() + 1, nl_gg1s_ferti_s9, true, a_farm, a_field);
            break;
        }
        SimpleEvent_(g_date->Date() + 1, nl_gg1s_ferti_s10, false, a_farm, a_field);
        break;
    case nl_gg1s_ferti_p9:
        if (!a_farm->FP_Slurry(a_field, 0.0, (NL_GG1S_CUT_DATE + 4) - g_date->DayInYear())) {
            SimpleEvent_(g_date->Date() + 1, nl_gg1s_ferti_p9, true, a_farm, a_field);
            break;
        }
        SimpleEvent_(g_date->Date() + 1, nl_gg1s_ferti_p10, false, a_farm, a_field);
        break;
    case nl_gg1s_ferti_s10:
        if (a_ev->m_lock || a_farm->DoIt_prob(0.90))
        {
            if (!a_farm->FA_NPK(a_field, 0.0, g_date->DayInYear(5, 9) - g_date->DayInYear())) {
                SimpleEvent_(g_date->Date() + 1, nl_gg1s_ferti_s10, true, a_farm, a_field);
                break;
            }
        }
        SimpleEvent_(g_date->Date() + 21, nl_gg1s_cut_to_silage5, false, a_farm, a_field);
        break;
    case nl_gg1s_ferti_p10:
        if (a_ev->m_lock || a_farm->DoIt_prob(0.90))
        {
            if (!a_farm->FP_NPK(a_field, 0.0, g_date->DayInYear(5, 9) - g_date->DayInYear())) {
                SimpleEvent_(g_date->Date() + 1, nl_gg1s_ferti_p10, true, a_farm, a_field);
                break;
            }
        }
        SimpleEvent_(g_date->Date() + 21, nl_gg1s_cut_to_silage5, false, a_farm, a_field);
        break;
    case nl_gg1s_cut_to_silage5:
        // At least 7 days from last watering and 21 from last application of fertilizer.
        if (g_date->Date() < NL_GG1S_WATER_DATE + 7) {
            SimpleEvent_(g_date->Date() + 1, nl_gg1s_cut_to_silage5, true, a_farm, a_field);
            break;
        }
        else
        {
            if (a_ev->m_lock || a_farm->DoIt_prob(0.40))
            {
                if (!a_farm->CutToSilage(a_field, 0.0, a_field->GetMDates(0, 0) - g_date->DayInYear())) {
                    SimpleEvent_(g_date->Date() + 1, nl_gg1s_cut_to_silage5, true, a_farm, a_field);
                    break;
                }
                NL_GG1S_CUT_DATE = g_date->DayInYear();
            }
            if (a_farm->IsStockFarmer()) //Stock Farmer
            {
                SimpleEvent_(g_date->OldDays() + g_date->DayInYear(10, 11), nl_gg1s_ferti_s12, false, a_farm, a_field);
            }
            else SimpleEvent_(g_date->OldDays() + g_date->DayInYear(10, 11), nl_gg1s_ferti_p12, false, a_farm, a_field);
            break;
        }
        break;
    case nl_gg1s_ferti_s12:
        if (a_field->GetMConstants(0) == 0) {
            if (!a_farm->FA_NPK(a_field, 0.0, -1)) { // raise an error
                g_msg->Warn(WARN_BUG, "NLGrassGrazed1Spring::Do(): failure in 'NPK application' execution", "");
                exit(1);
            }
        }
        else {
            if (a_ev->m_lock || a_farm->DoIt_prob(0.90))
            {
                if (!a_farm->FA_NPK(a_field, 0.0, g_date->DayInYear(30, 11) - g_date->DayInYear())) {
                    SimpleEvent_(g_date->Date() + 1, nl_gg1s_ferti_s12, true, a_farm, a_field);
                    break;
                }
            }
        }
        done = true;
        break;
    case nl_gg1s_ferti_p12:
        if (a_field->GetMConstants(0) == 0) {
            if (!a_farm->FP_NPK(a_field, 0.0, -1)) { // raise an error
                g_msg->Warn(WARN_BUG, "NLGrassGrazed1Spring::Do(): failure in 'NPK application' execution", "");
                exit(1);
            }
        }
        else {
            if (a_ev->m_lock || a_farm->DoIt_prob(0.90))
            {
                if (!a_farm->FP_NPK(a_field, 0.0, g_date->DayInYear(30, 11) - g_date->DayInYear())) {
                    SimpleEvent_(g_date->Date() + 1, nl_gg1s_ferti_p12, true, a_farm, a_field);
                    break;
                }
            }
        }
        done = true;
        break;
    case nl_gg1s_cattle_out:
        if (!a_farm->CattleOut(a_field, 0.0, g_date->DayInYear(30, 4) - g_date->DayInYear())) {
            SimpleEvent_(g_date->Date() + 1, nl_gg1s_cattle_out, true, a_farm, a_field);
            break;
        }
        // Keep them out there
        SimpleEvent_(g_date->Date(), nl_gg1s_cattle_is_out, false, a_farm, a_field);
        break;
 
    case nl_gg1s_cattle_is_out:    // Keep the cattle out there
                                   // CattleIsOut() returns false if it is not time to stop grazing
        if (!a_farm->CattleIsOut(a_field, 0.0, g_date->DayInYear(31, 8) - g_date->DayInYear(), g_date->DayInYear(31, 8))) {
            SimpleEvent_(g_date->Date() + 1, nl_gg1s_cattle_is_out, false, a_farm, a_field);
            break;
        }
        if (a_farm->IsStockFarmer()) //Stock Farmer
        {
            SimpleEvent_(g_date->Date() + 1, nl_gg1s_ferti_s11, false, a_farm, a_field);
        }
        else SimpleEvent_(g_date->Date() + 1, nl_gg1s_ferti_p11, false, a_farm, a_field);
        break;
 
    case nl_gg1s_ferti_s11:
        if (!a_farm->FA_Slurry(a_field, 0.0, g_date->DayInYear(5, 9) - g_date->DayInYear())) {
            SimpleEvent_(g_date->Date() + 1, nl_gg1s_ferti_s11, true, a_farm, a_field);
            break;
        }
        SimpleEvent_(g_date->Date() + 21, nl_gg1s_cut_to_silage6, false, a_farm, a_field);
        break;
    case nl_gg1s_ferti_p11:
        if (!a_farm->FP_Slurry(a_field, 0.0, g_date->DayInYear(5, 9) - g_date->DayInYear())) {
            SimpleEvent_(g_date->Date() + 1, nl_gg1s_ferti_p11, true, a_farm, a_field);
            break;
        }
        SimpleEvent_(g_date->Date() + 21, nl_gg1s_cut_to_silage6, false, a_farm, a_field);
        break;
    case nl_gg1s_cut_to_silage6:
        if (!a_farm->CutToSilage(a_field, 0.0, a_field->GetMDates(0, 0) - g_date->DayInYear())) {
            SimpleEvent_(g_date->Date() + 1, nl_gg1s_cut_to_silage6, true, a_farm, a_field);
            break;
        }
        if (a_farm->IsStockFarmer()) //Stock Farmer
        {
            SimpleEvent_(g_date->OldDays() + g_date->DayInYear(10, 11), nl_gg1s_ferti_s12, false, a_farm, a_field);
        }
        else SimpleEvent_(g_date->OldDays() + g_date->DayInYear(10, 11), nl_gg1s_ferti_p12, false, a_farm, a_field);
        break;
    case nl_gg1s_watering:
        if (a_ev->m_lock || a_farm->DoIt_prob(0.40))
        {
            if (g_date->Date() < NL_GG1S_CUT_DATE + 3) {
                // Too close to silage cutting, so try again tomorrow.
                SimpleEvent_(g_date->Date() + 1, nl_gg1s_watering, true, a_farm, a_field);
            }
            else
            {
                if (!a_farm->Water(a_field, 0.0, g_date->DayInYear(31, 8) - g_date->DayInYear())) {
                    SimpleEvent_(g_date->Date() + 1, nl_gg1s_watering, true, a_farm, a_field);
                    break;
                }
                NL_GG1S_WATER_DATE = g_date->Date();
            }
        }
        // End of thread
        break;
    default:
        g_msg->Warn(WARN_BUG, "NLGrassGrazed1Spring::Do(): "
            "Unknown event type! ", "");
        exit(1);
    }
    return done;
}