نیاز آبی از استاندارد FAO پیروی می‌کند: تبخیر-تعرق محصول ETc = ETo × Kc، با تبخیر-تعرق مرجع طبق Penman-Monteith و، برای هلند، استاندارد Makkink از KNMI. موازنه آب خاک (TAW، RAW، فاصله آبیاری) از همان راهنمای FAO-56 می‌آید. شوری از مدل Maas و Hoffman پیروی می‌کند، مجموع دمایی از مدل McMaster و Wilhelm. برای رشد زیر شیشه به کار Stanghellini ارجاع می‌دهیم.

1. Allen, R.G., Pereira, L.S., Raes, D. & Smith, M. (1998). Crop evapotranspiration: guidelines for computing crop water requirements. FAO Irrigation and Drainage Paper 56. FAO, Rome. fao.org/4/x0490e. منبع برای ETo (معادله ۶)، تصحیح Kc (معادله ۶۲/۶۵)، TAW/RAW (معادله ۸۲/۸۳) و جدول ۱۹/۲۲.
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11. Allen, R.G. & Pereira, L.S. (2009). Estimating crop coefficients from fraction of ground cover and height. Irrigation Science, 28(1), 17-34. doi:10.1007/s00271-009-0182-z
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14. Ayers, R.S. & Westcot, D.W. (1985). Water quality for agriculture. FAO Irrigation and Drainage Paper 29 Rev.1, Rome. جدول تحمل شوری Maas و Hoffman را بازتولید می‌کند.