c7d03397_ening_Tips_and_Plants___How_to__Plant_Uses
[Plant Symptoms] Slow growth Leaves are uniformly yellow-green Cucumbers are pointed at the tips [Deficiency] Nitrogen [Sources] Fish, alfalfa, or blood meal; green manures [Plant Uses] 
Chlorophyll, proteins, genetic material, hormones, and other chemicals
Organic Gardening Tips and Plants - How to