A system of agricultural devised by Masanobu Fukuoka that seeks to follow Nature by minimizing human interference: no chemical cultivation, no synthetic fertilizers or prepared compost, no weeding by tillage or herbicides, no dependence on chemicals. Neutrophiles The plants which can grow in neutral soils (pH range 6.5 – 7.4). Net farm income The money and non-money income form operators realize from farming as a return for labor, investment, and management after production expenses have been paid. Net farm income is measure in two ways net farm income before inventory adjustment and net farm income after inventory adjustment. Net farm income doesn't include changes in the value of inventories such as crops and livestock at the end of the year. Noxious Weed A weed plant especially undesirable, troublesome and difficult to control, e.g., Cynodon dactylon, Cyperus rotundus, Sorghum halepense , etc. Nurse Crop A companion crop which nourishes the main crop by way of nitrogen fixation and/or adding the organic matter into the soil, e.g., cowpea intercropped with cereals or new plantations of fruit trees.