Illustration of a low N + P bioassay response
Illustration of a low N bioassay
Illustration of a low P bioassay response
Illustration of a high bioassay response to nitrogen and phosphorus
Illustration of low light in a bioassay
Illustration of a high nitrogen bioassay response
Illustration of a high P response in a bioassay
Illustration of a low bioassay response (any element)
Illustration of high response to light in a bioassay